Hello @DeletedUser,

When a communication channel is "unconfirmed" it means the user has not yet confirmed it.  If it has been awhile, the user likely needs a new confirmation message so they can confirm it.   Users should be able to do this from within their Canvas account.  Users are unable to receive notifications to this communication channel until it is confirmed.

When a communication channel is "active" it means either the user already confirmed it, it was automatically confirmed by a site admin/account admin, or it was confirmed automatically by an SIS Import for institution-assigned email addresses.